Dental-film-developing apparatus.



H. F. WAITE.

DENTAL FILM DEVELOPING APPARATUS. APPLICATION FILED AHLZM 1916.

1.208244. Pmmd' Dea 12, 19:16;

" proved developing apparatus.

HARRY F. WAITE, OF WHITESTONE LANDING, NEW YORK.

DENTAL -FILM-DEVELOPING APPARATUS.

Specification of Letters Patent.

Patented Dec. 12, 1916.

Application filed Apri124, 1916. Serial No. 93,347.

To (ZZZ whom it may concern:

Be it known that I, HARRY F. VVAITE, a citizen of the United States, anda resident of vVhitestone Landing, county of Queens, and State of NewYork, have invented a new and useful Improvement in Dental-Film-Developing Apparatus, of which the following is a specification.

The object of my invention is to provide a device of this class in whichany film, but preferably a dental film, may be developed in daylightwithout aid of a dark room, and a further object of my invention is toprovide a device which may be readily cleansed, always kept in order,and always ready for use with a minimum of attention. These, and otherobjects, are accomplished by my invention, one embodiment of which ishereinafter more particularly set forth. v

For a more particular description of my invention, reference is to behad to the accompanying drawings, forming a parthereof, in which,

Figure l is a side elevation of my im- 7 Fig. 2 is a sectional viewof'the same, taken on the line 22 of Fig. 1; and Fig. 3 is a plan viewof the lower portion of the cap of my device.

Throughout the various views of the drawings, similar referencecharacters designate similar parts.

- My improved developing apparatus 1 is composed of a cylindrical shell2 which forms the lower portion, and a cap 3 which forms the upperportion. The cap 3 is also surmounted by a cover 4 which has a funnel 5at its center through which liquid may be poured into or out of theapparatus. In the bottom 6 of the cylinder 2 is provided a light-proofvent 7 which preferably takes the form of a screw-plug 8 with a bentperforation and suitable packing 9 between the head of this plug 8 andthe bottom 6. Any other suitable and light-proof form of vent may beemployed. The cap 3 fits the outer casing of the cylinder 2 with asliding light-tight fit, and the cover a fits this cap 3 in the samemanner, and with the addition of a bayonet joint 10 at each side, asshown.

To permit liquid to flow into or out of the chamber 2 and through thefunnel 5 without admitting light to the interior of the chamber 2, acurved partition 11 is placed in the cap 3, and made so as to bear snugagainst the cover 4. This partition 11 first extends radially from theedge of the cap 3, and then in the form of an annulus through about 330degrees, leaving a slight opening through which liquid can How about theoutside of this annulus through substantially 270 degrees, to a hole inthe bottom of the cap 3. This hole is designated by the character 12.

When it is desired to use the apparatus the cap 3 is removed from thecylinder--52, and the film, after having its protecting envelop removed,is placed within the said cylinder. These operations are, of course,carried on in a dark-room or other light-proof chamher, in order thatthe film may not be fogged or otherwise spoiled, but after the film isplaced within the cylinder 2, and the cap 3 replaced, the apparatus maybe removed into the light if desired. A developing solution is thenpoured in through the funnel 5 and after this said developing liquid hasdone its work it is removed by pouring through the opening 12 about thepartition 11 and out through the funnel 5. A washing solution or watermay be then inserted and removed in the same way, and finally the fixingsolution may be ap lied in a like manner and then removed, a er whichthe film may be taken out of the apparatus by first removin the cap 3and then the film 15. To facilitate the flow of liquid it is necessaryto permit air to enter, but this is done by opening the vent by turningthe plug 8, as above set forth. After the liquid has been removed fromthe apparatus the plug is always closed so as to prevent all leakage.After the apparatus has been used, as above described, it is readilytaken apart and cleaned before being put away, so that it is always insuitable condition for use, and does not become befouled or injured bythe liquids which are placed in it.

This apparatus may be used for any films which are suited to it, and maybe made in many forms, all of which come within the scope of myinvention, as set forth in the annexed claims.

What I claim is:

I 1. In a. photographic developing apparatus the combination of a liquidholding receptacle provided with a vent; a closure for said receptaclecomprising a cap having a perforation and a partition to provide atortuous passage into and out of said recep tacle; and a cover providedwith an opening fitting said cap and forming with said perratus the peaforation and partition, a tortuous light tight liquid passage into andout of said recep tacle, substantially as described.

2. In a photographic developing appaconiblnation of a liquid holdingadapted "for use as a developing receptacle chamber; a cap having anorifice and a curved partition partially closing said receptacleproviding a tortuous passage into and out of said receptacle; and aclosure having a funnel opening into said cap to r 1 e-Wiled -r formWith said orifice and partition, a tortuous light tight passage into andout of said receptacle, substantially as described.

3. In a device of the class described, a cap with a perforated bottom, acurved partition resting on said bottom and extending to one Wall of thecap, and a cover adapted to rest on said cap and said partition, saidcover having; a suitable means for admitting liquid to said cap andabout said partition.

HARRY F. VVAITE.

